odoo 11

when i changed the some setting as i described below, i can not reinstall the timesheet module

1.Enable "Time Billing" option in timesheet setting

2.Disable "Timesheets" option in Project setting

now i can not install or enable the Timesheet module and get the following error message

2019-02-21 14:21:48,751 14943 WARNING ProjectManagement-Backup2 odoo.modules.loading: Transient module states were reset
2019-02-21 14:21:48,805 14943 ERROR ProjectManagement-Backup2 odoo.modules.registry: Failed to load registry
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/tools/cache.py", line 84, in lookup
    r = d[key]
  File "/usr/lib/python3/dist-packages/odoo/tools/func.py", line 68, in wrapper
    return func(self, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/tools/lru.py", line 44, in __getitem__
    a = self.d[obj].me
KeyError: ('ir.model.data', <function IrModelData.xmlid_lookup at 0x7f126cc931e0>, 'project.project_project_2')

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 744, in parse
    self._tags[rec.tag](rec, de, mode=mode)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 642, in _tag_record
    f_val = self.id_get(f_ref)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 727, in id_get
    res = self.model_id_get(id_str, raise_if_not_found)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 733, in model_id_get
    return self.env['ir.model.data'].xmlid_to_res_model_res_id(id_str, raise_if_not_found=raise_if_not_found)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_model.py", line 1340, in xmlid_to_res_model_res_id
    return self.xmlid_lookup(xmlid)[1:3]
  File "<decorator-gen-21>", line 2, in xmlid_lookup
  File "/usr/lib/python3/dist-packages/odoo/tools/cache.py", line 89, in lookup
    value = d[key] = self.method(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_model.py", line 1329, in xmlid_lookup
    raise ValueError('External ID not found in the system: %s' % xmlid)
ValueError: External ID not found in the system: project.project_project_2

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/modules/registry.py", line 85, in new
    odoo.modules.load_modules(registry._db, force_demo, status, update_module)
  File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 380, in load_modules
    loaded_modules, update_module, models_to_check)
  File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 274, in load_marked_modules
    perform_checks=perform_checks, models_to_check=models_to_check
  File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 184, in load_module_graph
    _load_data(cr, module_name, idref, mode, kind='demo')
  File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 95, in _load_data
    tools.convert_file(cr, module_name, filename, idref, mode, noupdate, kind, report)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 791, in convert_file
    convert_xml_import(cr, module, fp, idref, mode, noupdate, report)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 852, in convert_xml_import
    obj.parse(doc.getroot(), mode=mode)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 751, in parse
    exc_info[2]
  File "/usr/lib/python3/dist-packages/odoo/tools/pycompat.py", line 86, in reraise
    raise value.with_traceback(tb)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 744, in parse
    self._tags[rec.tag](rec, de, mode=mode)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 642, in _tag_record
    f_val = self.id_get(f_ref)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 727, in id_get
    res = self.model_id_get(id_str, raise_if_not_found)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 733, in model_id_get
    return self.env['ir.model.data'].xmlid_to_res_model_res_id(id_str, raise_if_not_found=raise_if_not_found)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_model.py", line 1340, in xmlid_to_res_model_res_id
    return self.xmlid_lookup(xmlid)[1:3]
  File "<decorator-gen-21>", line 2, in xmlid_lookup
  File "/usr/lib/python3/dist-packages/odoo/tools/cache.py", line 89, in lookup
    value = d[key] = self.method(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_model.py", line 1329, in xmlid_lookup
    raise ValueError('External ID not found in the system: %s' % xmlid)
odoo.tools.convert.ParseError: "External ID not found in the system: project.project_project_2" while parsing /usr/lib/python3/dist-packages/odoo/addons/hr_timesheet/data/hr_timesheet_demo.xml:4, near
<record id="working_hours_requirements" model="account.analytic.line">
        <field name="name">Requirements analysis and specification</field>
        <field name="user_id" ref="base.user_root"/>
        <field name="date" eval="(DateTime.now() + relativedelta(days=-1)).strftime('%Y-%m-%d')"/>
        <field name="unit_amount">2.00</field>
        <field name="project_id" ref="project.project_project_2"/>
        <field name="amount">-60.00</field>
    </record>
2019-02-21 14:21:48,806 14943 ERROR ProjectManagement-Backup2 odoo.http: Exception during JSON request handling.
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/tools/cache.py", line 84, in lookup
    r = d[key]
  File "/usr/lib/python3/dist-packages/odoo/tools/func.py", line 68, in wrapper
    return func(self, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/tools/lru.py", line 44, in __getitem__
    a = self.d[obj].me
KeyError: ('ir.model.data', <function IrModelData.xmlid_lookup at 0x7f126cc931e0>, 'project.project_project_2')

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 744, in parse
    self._tags[rec.tag](rec, de, mode=mode)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 642, in _tag_record
    f_val = self.id_get(f_ref)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 727, in id_get
    res = self.model_id_get(id_str, raise_if_not_found)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 733, in model_id_get
    return self.env['ir.model.data'].xmlid_to_res_model_res_id(id_str, raise_if_not_found=raise_if_not_found)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_model.py", line 1340, in xmlid_to_res_model_res_id
    return self.xmlid_lookup(xmlid)[1:3]
  File "<decorator-gen-21>", line 2, in xmlid_lookup
  File "/usr/lib/python3/dist-packages/odoo/tools/cache.py", line 89, in lookup
    value = d[key] = self.method(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_model.py", line 1329, in xmlid_lookup
    raise ValueError('External ID not found in the system: %s' % xmlid)
ValueError: External ID not found in the system: project.project_project_2

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 651, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 310, in _handle_exception
    raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
  File "/usr/lib/python3/dist-packages/odoo/tools/pycompat.py", line 87, in reraise
    raise value
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 693, in dispatch
    result = self._call_function(**self.params)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 342, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/service/model.py", line 97, in wrapper
    return f(dbname, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 335, in checked_call
    result = self.endpoint(*a, **kw)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 937, in __call__
    return self.method(*args, **kw)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 515, in response_wrap
    response = f(*args, **kw)
  File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/main.py", line 938, in call_button
    action = self._call_kw(model, method, args, {})
  File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/main.py", line 926, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/usr/lib/python3/dist-packages/odoo/api.py", line 689, in call_kw
    return call_kw_multi(method, model, args, kwargs)
  File "/usr/lib/python3/dist-packages/odoo/api.py", line 680, in call_kw_multi
    result = method(recs, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/res/res_config.py", line 569, in execute
    self._install_modules(to_install)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/res/res_config.py", line 35, in _install_modules
    result = to_install_modules.button_immediate_install()
  File "<decorator-gen-42>", line 2, in button_immediate_install
  File "/usr/lib/python3/dist-packages/odoo/addons/base/module/module.py", line 71, in check_and_log
    return method(self, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/module/module.py", line 449, in button_immediate_install
    return self._button_immediate_function(type(self).button_install)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/module/module.py", line 543, in _button_immediate_function
    modules.registry.Registry.new(self._cr.dbname, update_module=True)
  File "/usr/lib/python3/dist-packages/odoo/modules/registry.py", line 85, in new
    odoo.modules.load_modules(registry._db, force_demo, status, update_module)
  File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 380, in load_modules
    loaded_modules, update_module, models_to_check)
  File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 274, in load_marked_modules
    perform_checks=perform_checks, models_to_check=models_to_check
  File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 184, in load_module_graph
    _load_data(cr, module_name, idref, mode, kind='demo')
  File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 95, in _load_data
    tools.convert_file(cr, module_name, filename, idref, mode, noupdate, kind, report)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 791, in convert_file
    convert_xml_import(cr, module, fp, idref, mode, noupdate, report)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 852, in convert_xml_import
    obj.parse(doc.getroot(), mode=mode)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 751, in parse
    exc_info[2]
  File "/usr/lib/python3/dist-packages/odoo/tools/pycompat.py", line 86, in reraise
    raise value.with_traceback(tb)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 744, in parse
    self._tags[rec.tag](rec, de, mode=mode)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 642, in _tag_record
    f_val = self.id_get(f_ref)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 727, in id_get
    res = self.model_id_get(id_str, raise_if_not_found)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 733, in model_id_get
    return self.env['ir.model.data'].xmlid_to_res_model_res_id(id_str, raise_if_not_found=raise_if_not_found)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_model.py", line 1340, in xmlid_to_res_model_res_id
    return self.xmlid_lookup(xmlid)[1:3]
  File "<decorator-gen-21>", line 2, in xmlid_lookup
  File "/usr/lib/python3/dist-packages/odoo/tools/cache.py", line 89, in lookup
    value = d[key] = self.method(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_model.py", line 1329, in xmlid_lookup
    raise ValueError('External ID not found in the system: %s' % xmlid)
odoo.tools.convert.ParseError: "External ID not found in the system: project.project_project_2" while parsing /usr/lib/python3/dist-packages/odoo/addons/hr_timesheet/data/hr_timesheet_demo.xml:4, near
<record id="working_hours_requirements" model="account.analytic.line">
        <field name="name">Requirements analysis and specification</field>
        <field name="user_id" ref="base.user_root"/>
        <field name="date" eval="(DateTime.now() + relativedelta(days=-1)).strftime('%Y-%m-%d')"/>
        <field name="unit_amount">2.00</field>
        <field name="project_id" ref="project.project_project_2"/>
        <field name="amount">-60.00</field>
    </record>

i should say that my data is very important and i can not create a new database

Help me please

Thanks